which trains travel from Gare due lyon into Provence. high speed? do i need to purchase in advance? different amenities between first class and standard ticket? thank you!
Any train that is TGV is what you want. The early you buy the lower the price.
This site has all the info about the TGV.
https://www.seat61.com/tgv.htm
For best pricing, purchase tickets as soon as they become available, typically 90 days in advance, sometimes sooner.